BOSTON – A Rockland man charged with starting a fire at an adult video store that spread to two other businesses and an apartment on Bridge Street in Weymouth is being held without bail.

Quincy District Court Judge Mark Coven on Monday ordered Jon F. Fernald, 44, of 150 Martha Drive, Rockland, held without bail until a hearing can be held to determine if he poses a danger if released.

The brief arraignment took place in Fernald’s room at the burn unit at Massachusetts General Hospital where he is being treated for severe burns that police say he suffered after starting a fire at the Amazing Intimate Essentials store at 138 Bridge St. early Saturday morning.

The three-alarm blaze spread to a nail salon and a tile store and an apartment, all of which were housed in the same building. The four tenants of the apartment escaped unharmed.

A witness reported seeing a man start the fire and pointed officers to a man who was fleeing down Bridge Street, according to police. The officers caught up with the man, later identified as Fernald, a short distance away at 180 Bridge St. He was arrested and charged with arson of a dwelling. The fire is still under investigation.

Coven set a court date of April 16 for a status hearing to see if Fernald has recovered enough from his injuries to attend a dangerousness hearing and to hear the results of a mental competency exam.

Christian Schiavone may be reached at cschiavone@ledger.com or follow him on Twitter @CSchiavo_Ledger.